The AirTAC AirTAC GFR300-10G Filter Regulator, G3/8, Auto Drain is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT3/8" ports, a automatic drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR300-10G is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a 3/8 inch port with G (BSPP) thread, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, a fitted embedded square gauge reading in psi, and a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjusts from 0.15-0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl keeps the bowl contents visible for inspection.
This is a genuine AirTAC part, distributed with the full GFR range across sizes 200, 300, 400 and 600, with port options from 1/8 to 1 inch, G or NPT thread alternatives, manual or differential-pressure drain variants, a 5 um (code W) filter element option, and gauge scale choices. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures for your application on request.
| Model | AirTAC GFR300-10G Filter Regulator, G3/8, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard type |
| Adjusting mechanism | Balanced type |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Drain type | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, psi scale |
| Reflux valve | Not fitted |
Specifications follow the official AirTAC G-series air-preparation data. The regulating band is set by the drain type: automatic and differential-pressure drains regulate 0.15 - 0.9 MPa, a manual drain regulates 0.05 - 0.9 MPa. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). Air must not freeze in the unit. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| 10 | Port size PT3/8". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
Field order is size, port, drain, type, bracket, gauge, shape, scale, grade, thread, reflux — a blank position takes the default. Example: GFR300-08 is a 300 body, PT1/4", differential drain, standard type, bracket included, gauge fitted, 40 µm, PT thread, no reflux valve.
A larger body carries a larger port and holds set pressure better as flow rises. AirTAC publishes flow only as curves, so size the body from your peak demand with headroom. The GFR600 uses an aluminium-alloy bowl; the 200, 300 and 400 bodies use PC.
| This model | GFR300 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Point-of-use conditioning on a machining centre's pneumatic supply: the 40 um element strips water and chips-laden particulate before air reaches tool-clamp and tool-change cylinders, while the regulator holds a steady set pressure for consistent clamping force.
Mounted at the drop feeding conveyor-mounted stopper and pusher cylinders on a packaging line, where the automatic drain copes with condensate on a line that runs unattended across shifts and the psi gauge lets technicians verify set pressure at a glance.
Installed at the air drop above an assembly bench in a factory cell, giving operators filtered and regulated air for air tools and small actuators, with the bracket allowing panel or frame mounting and the square psi gauge simplifying daily pressure checks.
Start with the port step: the 300 size with a 3/8 inch port suits lines running more air than a 1/4 inch unit can pass, but the right size ultimately depends on required flow, which AirTAC publishes as curves rather than a single rating - ask us to confirm sizing against your application before ordering. Choose the drain to match access: automatic drain (this unit) suits installations that are not checked daily; manual drain suits attended stations; differential-pressure drain is the catalogue default. Filter grade is 40 um standard here, with 5 um (code W) available where finer particulate removal is needed. The fitted square gauge reads in psi; MPa and bar scales and an external round gauge are alternatives. Thread is G (BSPP) on this unit, with PT standard and NPT available as order options; a bracket is included.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 series as curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Send us your application's air consumption and working pressure and we will confirm the sizing against the datasheet curves on request before you order.
The automatic drain ejects collected condensate from the bowl on its own, which suits installations that are not inspected daily. The catalogue also offers a manual drain for attended stations and a differential-pressure drain as the default; the drain choice also affects the regulator's adjustment range, so tell us your access and pressure needs and we will confirm the right variant.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity, thread type (PT / G / NPT), gauge scale and destination. We confirm price, availability and lead time — usually within 7-8 hours.